/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 86131
 * Date: 2023-10-24
 * Time: 18:58
 */
public class TestDemo {
    public static void main(String[] args) {
        String str1 = "hello";
        System.out.println(str1);
        String str2=" caijun";
        System.out.println(str1+str2);
        System.out.println("hello world");


    }
}
